A free library of mathematical puzzles for children in kindergarten through grade 6. Every one opens in a browser with nothing to install and nothing to sign up for, and keeps working when the connection does not.
OpenPuzzle.org makes mathematical puzzle apps that simultaneously engage the brilliant child and the struggling adult. Their quality comes not from flashiness or addictive reward loops but from the intellectual joy of solving something challenging. The puzzles are free and without ads. We don't do glitz.
Parents should expect ethical behaviour from educators. The priority should not be to capture the most children and keep them hooked for as long as possible. The priority should be to give children inspired experiences and then let them go.
OpenPuzzle.org offers ethically grounded puzzle experiences. They encourage curiosity, celebrate tough problem-solving, and respect your child's time.
To create a free library of deep mathematical puzzles.
None of your data is collected, used, or sold. Your progress is stored locally in your browser. The downside is that it can be lost and is not transferable between devices yet (we are thinking about how to make that happen).
Many of the puzzles found in apps, books, and websites have been invented, copied, and adapted so many times that it is often hard to trace who originally created them. Where there is a clear connection to the origin of a puzzle, we try to keep credits.
Our goal is to harness the power of AI to offer these widely-known puzzles for free — and free people from platforms that charge unreasonable prices, run predatory advertisements, or collect personal data.
The code is predominantly generated by artificial intelligence, yet everything is checked and curated by humans.
Sasha Kaurov (PhD) is a father searching for quality educational experiences for his son. Professionally, he's an astrophysicist and science communicator. He creates free education resources that are open to everyone.
Gordon Hamilton (MMath, PhD) designs board games like Santorini and curricular math puzzles like you'll find here. The puzzles are classroom-tested and teacher-approved. Watch the documentary "Put your students in a pickle!" to see him in action.
Both the puzzles and their code implementations are protected under Creative Commons license, CC BY-NC-ND.
Tell us what worked, what confused someone, or what you would like to see. We read every message. hello@openpuzzle.org